n.
an exclamatory expression of amazement and admiration following, and in recognition of, an impact of incredible magnitude or other momentous occasion; similarly, an action of such remarkable caliber as to warrant the use of the exclamation. Also a really fun word to say at dramatic intervals.

v.
the performance of such an action mentioned above.

Coined in homage to the great King Bowser Koopa, who is slow-moving but significantly powerful and awe-inspiring in action.

"I'm going to bodycheck you into the electric fence, wait for it, wait for--WABOWSER!"

"The best part of that Oilers game was when Cory Cross WABOWSERed himself into the boards. Because he's Cory Cross. And he's terrible."